By Dave Smith
Step via quite a lot of helpful issues utilizing entire and real-world operating code examples; comprises greater than a hundred down-to-earth code recipes. This booklet is up-to-date to incorporate the Android 5.0 SDK, in addition to past releases. rather than summary descriptions of complicated options, in Android Recipes, you will discover stay code examples. in the event you commence a brand new undertaking you could ponder copying and pasting the code and configuration documents from this e-book after which enhancing them to your personal customization needs.
Crammed with insightful guide and necessary examples, this fourth variation of Android Recipes is your consultant to writing apps for one in all today’s preferred cellular systems. It bargains pragmatic suggestion that can assist you get the task performed quick and good. this may prevent loads of paintings over making a venture from scratch!
Android is still one of many major cellular OS and improvement structures using cutting-edge cellular thoughts and the apps environment. Android seems complicated, yet bargains a number of equipped improvement kits to these getting into Android with differing programming language ability sets.
What you’ll learn
- Code for Android smartphones and tablets
- Use exterior libraries to avoid wasting time and effort
- Boost app functionality through the use of the Android NDK and RenderScript
- Design apps for functionality, responsiveness, and seamlessness
- Send facts among units and different exterior hardware
- Persist software information and proportion it among applications
- Capture and play again a variety of equipment media items
- Communicate with internet services
- Get the main from your person interface
Who this booklet is for
This ebook is a convenient reference for all Android app builders.
Table of Contents
1. Layouts and Views
2. consumer Interaction
3. Communications and Networking
4. Interacting with machine and Media
5. Persisting Data
6. Interacting with the System
7. images and Drawing
8. operating with Android NDK and Renderscript
Read Online or Download Android Recipes A Problem-Solution Approach for Android 5.0 PDF
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Extra resources for Android Recipes A Problem-Solution Approach for Android 5.0
This animation slides the views in and temporarily shrinks // the view to half size. WRAP_CONTENT)); } } 31 32 CHAPTER 1: Layouts and Views In this example, we have modified the APPEARING, DISAPPEARING, and CHANGE_DISAPPEARING transition animations for our Button layout. The first two transitions affect the item being added or removed. When the Add Item button is clicked, the new item horizontally rotates into view. When any of the Remove buttons are clicked, that item will vertically rotate out of view.
Each new button is outfitted with the ability to remove itself from the layout when it is tapped. In order to animate this process, all we need to do is set android:animateLayou tChanges="true" on the LinearLayout, and the framework does the rest. By default, a new button will fade in to its new location without disturbing the other views, and a removed button will fade out while the surrounding items slide in to fill the gap. We can customize the transition animations individually to create custom effects.
The count of all items is determined by summing up the counts in each section. This includes the header views, which the list treats the same as any other row. Traditionally, this means those items are also interactive and will transfer a click event to an attached listener. Since we don’t want this behavior for headers, we must also override areAllItemsEnabled() and isEnabled() to indicate to the view that headers should not be interactive. CHAPTER 1: Layouts and Views 55 Inside the getView() method, we are passed a view type that we can use to determine which type of view should be returned.